JSON Formatter JSON Validator JSON Minifier JSON Diff JSON to CSV JSON to YAML JSON Sort Keys JSON Viewer JSON Escape/Unescape JSON to XML XML to JSON YAML to JSON JSON to TypeScript JSON to PHP Array JSON Stringify See all JSON tools →
CSV to SQL CSV to Markdown CSV Diff CSV to JSON CSV to XML CSV Deduplicator See all CSV tools →
Sort & Dedupe Lines Slug Generator Case Converter Character & Word Counter Text Diff Regex Tester Find & Replace Reverse Text Text Repeater Remove Duplicate Lines Whitespace Remover Remove Line Breaks Morse Code Translator ROT13 / Caesar Cipher NATO Phonetic Alphabet LLM Token Counter Word Frequency Counter Add Line Numbers Remove Accents Strip HTML Tags Extract Emails Extract URLs Remove Emojis Count Occurrences Remove Extra Blank Lines Remove Duplicate Words Word Wrap See all Text tools →
URL Parser HTML Entity Encoder HTML Entity Decoder Base64 Encoder Base64 Decoder URL Encoder URL Decoder JWT Decoder JWT Encoder Text to Hex Hex to Text Text to Binary Binary to Text Base32 Encode Base32 Decode User Agent Parser HTTP Status Codes MIME Type Lookup See all Encoding tools →
Hash Generator MD5 Hash Generator SHA-256 Hash Generator SHA-512 Hash Generator SHA-1 Hash Generator HMAC Generator See all Hash tools →
Markdown to HTML HTML Formatter XML Formatter SQL Formatter YAML Formatter CSS Formatter CSS Minifier JavaScript Formatter See all Formatters tools →
PX to REM Converter Data Size Converter Unix Timestamp Converter Number Base Converter Roman Numeral Converter Temperature Converter Length Converter Weight Converter Speed Converter Area Converter Volume Converter Time Duration Converter Angle Converter Pressure Converter Energy Converter Number to Words Cron Expression Parser Percentage Calculator Aspect Ratio Calculator Average Calculator Hex to Binary Binary to Hex Hex to Decimal Decimal to Hex Binary to Decimal Decimal to Binary Kilometers to Miles Miles to Kilometers Centimeters to Inches Inches to Centimeters Feet to Meters Meters to Feet Celsius to Fahrenheit Fahrenheit to Celsius Kilograms to Pounds Pounds to Kilograms MPH to KM/H KM/H to MPH See all Converters tools →
Color Converter Color Contrast Checker UUID Generator Lorem Ipsum Generator Password Generator Passphrase Generator Username Generator CSS Gradient Generator Box Shadow Generator Color Palette Generator Cubic Bezier Generator QR Code Generator Meta Tag Generator Border Radius Generator Glassmorphism Generator SVG Blob Generator Placeholder Image Generator See all Generators tools →
Guides Pricing
135 tools · zero uploads · runs in your browser

Every developer tool
you actually need

Format JSON, decode a JWT, diff two files, convert units, generate UUIDs — fast, private utilities that run in your browser.

decode a JWT diff two JSONs pretty-print SQL unix timestamp → date generate a UUID px → rem
// recently used
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Base64 Encoder encode text to Base64 Encoding SHA-256 Hash Generator generate a SHA-256 hash Hash MD5 Hash Generator generate an MD5 hash Hash UUID Generator Generate UUID v4 identifiers online for free. Instantly create... Generators JSON Formatter Format and beautify JSON online for free. Paste your JSON to g... JSON JSON Validator Validate JSON online instantly. Check your JSON for syntax err... JSON

Browse all 135 tools by category

Encoding tools

18 tools view all →

Base64, URL, HTML-entity, hex and binary encoders and decoders, plus a JWT inspector and URL parser — handy for debugging APIs, data URIs and auth tokens.

URL Parser· HTML Entity Encoder· HTML Entity Decoder· Base64 Encoder· Base64 Decoder· URL Encoder· URL Decoder· JWT Decoder +10 more

Hash tools

6 tools view all →

Generate MD5, SHA-1, SHA-256 and SHA-512 digests and HMAC signatures for checksums, integrity checks and API request signing.

Hash Generator· MD5 Hash Generator· SHA-256 Hash Generator· SHA-512 Hash Generator· SHA-1 Hash Generator· HMAC Generator

Generators tools

17 tools view all →

Generate UUIDs, strong passwords, placeholder text and usernames, plus colour palettes, gradients and placeholder images — all cryptographically random.

Color Converter· Color Contrast Checker· UUID Generator· Lorem Ipsum Generator· Password Generator· Passphrase Generator· Username Generator· CSS Gradient Generator +9 more

JSON tools

15 tools view all →

Format and validate JSON, convert it to CSV, YAML, XML or TypeScript, diff two payloads, sort keys, or explore a large document in an interactive tree.

JSON Formatter· JSON Validator· JSON Minifier· JSON Diff· JSON to CSV· JSON to YAML· JSON Sort Keys· JSON Viewer +7 more

CSV tools

6 tools view all →

Convert CSV to JSON, SQL, Markdown or XML, diff two exports, and remove duplicate rows — with auto-detected delimiters and header rows.

CSV to SQL· CSV to Markdown· CSV Diff· CSV to JSON· CSV to XML· CSV Deduplicator
See all 8 categories →

Why SnapTools

100% in your browser

Your data never leaves your device — nothing is uploaded to a server, so you can safely paste tokens, keys and private payloads.

Free with no limits

No accounts, no paywalls, no daily caps. Every tool is free to use as often as you like, forever.

Fast & keyboard-first

Instant results as you type, a ⌘K palette to jump between tools, and copy-to-clipboard on every output.

Frequently asked questions

Yes. All 135 tools are completely free, with no sign-up and no usage limits.
No. Every tool runs entirely in your browser using JavaScript — your input is never sent to a server.
No. SnapTools works in any modern browser — there is nothing to download or install.
Once a tool page has loaded it keeps working without a connection, since all processing happens locally on your device.
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